Chrome vanadium steel. Heat treated. Punches: (5) Taper punches, (5) Pin punches, (2) Center punches. Chisels: (3) Clod chisels, (1) Chisel gauge and (1) Plastic storage tray. This 16 piece punch and chisel set includes the following sizes: Taper Punch: 3/32 x 5-1/4, 1/8 x 5-3/4, 5/32 x 6, 3/16 x 6-1/4, 1/4 x 6-3/4; Cold Chisels: 3/8 x 5-1/2, 1/2 x 6, 5/8 x 6-1/2; Pin Punch: 3/32 x 4-1/4, 1/8 x 4-3/4, 5/32 x 5, 3/16 x 5-1/4, 1/4 x 5-3/4; Center Punch: 1/8 x 5, 3/16 x 6 .